Boiler-furnace.



L. s. POWELL.

BOILER FURNACE.

APPLICATION FILED SEPT. 20, 1913.

1, 1 1 3,482, Patented Oct. 13, 1914.

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L. S. POWELL.

BOILER FURNACE.

APPLICATION FILED SEPT. 20, 1913.

1,11 3,482. Patented Oct. 18, 1914.

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Q. a Cl m 1 LYMAN s. POWELL, or CHICAGO, ILLINOIS.

BOILER-FURNACE.

Specification of Letters Patent.

Patented Oct. 13, 1914.

Application filed September 20, 1913. Serial No. 790,880.

To all whom it may concern:

Be it known that I, LYMAN S. POWELL, a citizen of the United States, and a resident of the city of Chicago, county of Cook, and State of Illinois, haveinvented certainnew and useful Improvements in Boiler-Furwill be of high efficiency in operation.

Other objects will appear hereinafter.

With these objects in view the invention consists in the combinations and arrangements of parts hereinafter described and claimed.

The invention will be best understood by reference to the accompanying drawings forming a part of this specification, and in which, Figure 1 is of a boiler and furnace embodying my invention, Fig. 2' is a vertical transverse section taken on substantially line 42-00 of Fig. 1', and Fig. '3 is a view similar to Fig. '1, illustrating my invention applied to a furnace such as is used in conjunction with a water-tube-boiler.

The preferred form of construction as illustrated in the accompanying drawings comprises a boiler 1 mounted in a furnace consisting of ash pit 2 and fire box 3 which are separated by a grate '4, the conventional bridge 5 being arranged at the rearward end of said ash pit and fire box.

Spaced rearwardly of the bridge 5 is a transversely extending wall 6' between which and the bridge 5'is constituted a mixing chamber 7 The chamber 7 is divided by a medial longitudinally extending partition 8 whereby the smoke and heated gases emanating from the fire box 3 will be divided in theirrearward passage under the boiler. Arranged at the upper side of the.

mixing chamber 7 at either side of the partition 8 is a plurality of transversely extending arcuate bafile blocks 9. Said bafile blocks 9 are spaced apart and are arranged at progressively decreasing elevations as a vertical longitudinal section clog the of said blocks are thus formed with the exshown with the lowest blocks at the rearward end of said mixing chamber. The inner ends of said blocks are supported upon the upper edge of partition 8 resting loosely thereon, the outer ends of 'said blocks extending obliquely upwardly and being supported through loose engagement with the inner sides of the lateral walls of the furnace, as clearly shown in Fig. 2. The space intervening the foremost baffle blocks 9 and the under side of the boiler is closed by a wall 10 of masonry so as to prevent .the smoke and gases passing over said baflle blocks, the only remaining avenue of escape being between said blocks and the upper edge of bridge 5.

With the arrangement disclosed it will be seen that the smoke and gases emanating from the fire box will enter the mixing chamber 7 at opposite sides of the partition 8. These gases will impinge upon the front vertical sides of said blocks and be deflected thereby upwardly against the under side of the boiler. A thorough agitation or mixing of the smoke and gases is thus effected which results in a complete .combustion and hence in a maximum utilization of the fuel. Also, with this arrangement through the upward deflection of the smoke and gases toward the boiler, as above mentioned the heat developed in the furnace will be applied to the greatest advantage or where the same will perform its function, namely that of heating the boiler. The wall 6 is of such a height that all of the gases entering the mixing chamber will be required to pass upwardly in escaping therefrom thereby impeding the otherwise too rapid escape of the gases and elfecting the desired agitation thereof with the advantageous results as above mentioned.

The baflle blocks are formed preferably of fire clay, this material being most durable and best fitted for employment in this case, and the upper sides of said blocks are tapered in form in order to shed the soot and dust which might otherwise accumulate and passage through the furnace. All

ception of the foremost blocks which are flat attheir upper sides in order to support the wall 10 above the same. The respective ends of said blocks rest loosely against the upper edge of the partition 8 and the lateral walls of the furnace as above mentioned in order to permit of said blocks adjusting thema selves automatically during the expansion and contraction which necessarily takes place in the heating and cooling of said blocks when the furnace isin use. With the construction set forth it is obvious that in the event of said blocks expanding the outer ends thereof which rest loosely against the lateral walls of the furnace will slide vertically upon said walls and thus prevent cracking or rupture of the blocks, as might otherwise result were the ends thereof securely anchored. Conversely in the event of contraction of said blocks, the outer ends thereof will slide downwardly upon the lateral walls of the furnace to correspond.

Thus, with this construction the baflie blocks will automatieallyhdjust-themselves as governed by existing conditions.

In Fig. 3' of the drawings, I have shown my invention applied to a. furnace used in conjunction with a water-tube boiler. In boilers of this character the under side of the boiler communicates with the furnace through an opening 11 provided at the rearward portion of the boiler, the smoke and gases passing from the furnace through said opening around the rearward edge of the baffle plate 12 which is provided at the upper side ofthe fire box of the furnace,'the

smoke and gases contacting directly with the pipes 13 through which the water is circulated. In boilers of this character, it has been found that the smoke and heated gases do not travel rearwardly a sufficient distance to properly heat the rearward ends of the water pipes 13, the smoke and gases taking the shortest path which is in close proximity with the rearward end of baffle plate 12 and so that the central portions of the pipes 13 will be heated to a greater extent than the rearward ends thereof which remain.comparatively cool. In employing my invention. in a furnace used with a boiler of this character I have found that byspacing the baflle blocks 9 apart at progressively increasing distances toward the rear of the mixing chamber the flow of smoke and gases from said chamber will be retarded at the front portion thereof and facilitated at the rearward portion thereof and whereby a uniform escape of smoke and gases through the opening 11 into the boiler will beafi'ected with the resulting uniform distribution of heat applied to the water-tubes. Said bafile blocks are shown thus arranged in Fig. 3 of the drawings. It is of course understood that the degree of separation or spacing of the blocks will be varied in furnaces of different sizes, dimensions and, proportions, the important consideration being that said blocks be spaced apart at progressively increasing distances toward the rear of the mixing chamber, the exact spacing being best determined through experiment.

With a construction as set forth, it will be found that the efficiency of a boiler will be greatly increased and that economizing in fuel will be experienced. I

While I have'illustrated and described the preferred forms of construction for carrying my invention into effect, these are capable of variation and modification without departing from the spirit of the invention. I, therefore, do not wish to be limited to the exact details of construction set forth, but desire to avail myself of such variations and modifications as fall within the scope of the appended claims.

Having described my invention what -I claim as new and desire to secure by Letters Patentis:

1. The combination in a boiler furnace, of a fire box; a mixing chamber; a bridge separating said fire box and mixing chamber; a plurality of transversely extending baffle blocks arranged at the upper side ofsaid chamber in spaced relation; and substantially vertical supporting surfaces at the sides of said mixing chamber, said blocks extending upwardly and outwardly at a comparatively steep inclination from substantially the medial 'or center line of said mixing chamber at both sides thereof, the upper ends of said blocks resting loosely against said supporting surfaces, substantially as described.

2. The combination in a boiler furnace, of a fire box; a mixing chamber; a bridge separating said fire box and mixing chamber; a longitudinally extending partition in said chamber arranged substantially medially thereof; and a plurality of transversely extending elongated baffle blocks arranged at the upper side of said chamber at either side of said partition, said blocks being spaced apart, the inner ends of said blocks resting upon said partition, the outer'ends of said blocks being inclined upwardly at a comparatively steep inclination and resting loosely against the lateral walls of said chamber so as to permit of creeping of said ends upon said walls during expansion of said blocks, substantially as described.

3. The combination in a boiler furnace, of a fire box; a mixing chamber; a bridge separating said fire box and mixing chamber; a longitudinally extending partition in said chamber arranged substantially medially thereof; and a plurality of transversely extending baflie blocks arranged at the. upper side of said chamber at either side of such partition, said blocks being spaced apart so as to form outlet passages for the products of combustion entering said mixing chamber from said fire box, and said blocks being arranged .at progressively decreasing elevations, substantially as described.

4. The combination in a boiler furnace of a fire box; a mixing chamber; a bridge separating said fire box and mixing chamber;

1 ,i-asnsa a longitudinally extending partition in said chamber arranged a substantially medially thereof; and a plurality of transversely extending arcuate bafiie blocks arranged at the upperisideiof said chamber at either side of said partition, said blocks being spaced apart and arranged at progressively decreasing elevations, ,the spaces between said blocks forming outlet passages for the productsof combustion entering said mixing chamber from said fire box, the inner ends thereof resting upon said partition, the outer end'sofrsaid blocks being inclined upwardly and restingv against the lateral walls of said chamber, substantially as described.

5. The-combination in a boiler furnace of a fire box; a mixing chamber; a bridge separating said fire box and mixing chamber; a longitudinally extending partition in said chamber arranged substantially medially thereof; and a plurality of transversely extending baflie blocks arranged at the upper side of said chamber at either side of said partition, said blocks being spaced apart and arranged at progressively decreasing elevations, the spaces between said blocks forming outlet passages for the products of combustion entering said mixing chamber from said fire box, the inner ends thereof resting loosely upon said partition, the outer ends of said blocks being inclined upwardly and resting loosely against the lateral walls of said chamber, substantially as described.

6. The combination in a boiler furnace of a fire box; abridge at the rearward end of said fire box; a transversely extending wall spaced rearwardly of said bridge defining the rearward end of a mixing chamber; a

. longitudinally extending substantially medial partition in said chamber extending from said bridge to said wall; and a plurality of transversely extending arcuate bafile blocks arranged at the upperside of said chamber and at either side vof said partition; said blocks being spaced apart and arranged at progressively decreasing elevations, thevspaoes between said blocks forming outlet passages for the products of combustion entering said mixing chamber from said fire box, the respective ends thereof resting against the upper edge of sald partition and the lateral walls of said chamber.

substantially as describ 7. The combination in a boiler furnace, of a fire box; a mixing chamber; a bridge separating said fire box and mixing chamber; a longitudinally extending partition in said chamber arranged substantially medially thereof; and a plurality of transversely extending bafile blocks arranged at the upper side of said chamber at either side of said partition, said blocks being spaced apart so as to form outlet passages for the products of combustion entering said mixing chamher from said fire box, said blocks being arranged at progressively decreasing eleva- -t1ons,1the inner ends of said blocks restlng upon said partition, the outer ends of said blocks being inclined upwardly at a comparatively steep inclination and resting loosely against the lateral walls of said chamber so asto permit of creeping of said ends upon said walls during expansion of said blocks, substantially as described.

8. The combination in a-boiler furnace, of a =fire box; a mixing chamber; a bridge separating said fire box and mixing chamber; a longitudinally extending partition' in said chamber arranged substantially medially thereof; substantially vertically disposed supporting surfaces at the sides of said mixing chamber; and a plurality of transversely extending arcuate blocks arranged at the upper side of said chamber at either side 0 said partition, said blocks being spaced apart and arranged at progressively decreasing elevation's, the-spaces between said blocks forming outlet passages for the products of combustion entering said mixing chamber from said fire box, the inner ends of said blocks resting upon said partition, the outer ends of said blocks being inclined upwardly at a comparatively steep inclination and resting loosely against said supporting surfaces so as to permit of creeping of said ends upon said surfaces during expansion of said blocks, substantially as described. v

9. The combination in a boiler furnace, of afire box; a mixing chamber; a bridge separating said fire box and mixing chamber; a longitudinally extending partition in said chamber arranged substantially medially thereof; and a plurality of transversely extendin baflle blocks arranged at the upper side 0 said chamber at either side of said partition, said blocks being spaced apart and arranged at progressively decreasing elevations, the spaces between said blocks forming outlet passages for the products of combustion entering said mixing chamber from 'wa-ll spaced rearwardly of said bridge defining the rearward end of a mixing chamber; a longitudinally extending partition in said chamber extending from said bridge to said wall; substantially vertically extending supporting surfaces at either side of said partition; and a lurality of transversely extending arcuate aflle blocks arranged at the upper side of said chamber and at either side of said partition, said blocks being spaced apart and arranged at progressively decreasing elevations, the spaces between said blocks forming outlet passages for the products of combustion entering said mixing chamber from said fire box, the inner ends of said blocks resting against the upper edge of said partition and the outer ends of said blocks being disposed at a com aratively steep inclination and resting loose y against said supporting surfaces so as to permit of creeping of said ends upon said surfaces during expansion of said blocks, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

LYMAN S. POWELL.

Witnesses:

J OSHUA R. H. Porrs, HELEN F. LILLIs. 

